[单项选择]A) normal C) ordinary
B) regular D) common


A. normal
B. regular
C. ordinary
D. common

[单项选择]A) normal C) ordinary
B) consistent D) regular


A. normal
B. consistent
C. ordinary
D. regular

[单项选择][A] constant [C] regular
[B] lasting [D] normal


A. constant
B. lasting
C. regular
D. normal

[单项选择]

Passage Four
We all know that the normal human daily cycle of activity is of some 7-8 hours’ sleep alternating with some 16-17 hours’ wakefulness and that, broadly s peaking, the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can he modified.
The question is no mere academic one. The ease, for example, with which people can change from working in the day to winking at night is a question of growing importance in industry where automation calls for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep end wakefulness, sleeping during the day end working at night. Unfortunately, it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p. m. to 12 midnight the third and so on. This means that no s
A. to change shifts at longer intervals
B. to have longer shifts
C. to arrange for some people to work on night shifts only
D. to create better living conditions for night workers

[单项选择][A] conventional[C] general
[B] common [D] normal


A. common
B. conventional[C] general
C. normal

[单项选择]All normal human beings are ______ at least to a degree - they get a feeling of warmth and kinship from engaging in group activities.
A. segregated
B. congregational
C. gregarious
D. egregious

[单项选择]Firms hold regular sales conferences because they can _______.


A. exchange information about the business.
B. receive higher education.
C. travel around the world.
D. take the opportunities to stay together with their colleagues.

[单项选择]We also still offer our regular clients favorable discount depending on the size of order．
A. 我们也还要根据定单的大小对老客户提供优惠的折扣。
B. 我们将一如既往地根据定单对老客户提供优惠价格。
C. 我们还要根据定单尺寸对规则的客户提供优惠考虑。
D. 我们也将要根据命令的大小对守规矩的人提供优惠的评语。

[单项选择]Recent study shows that regular review leads to （　） performance on tests.
A. improve
B. improves
C. improved
D. improvement

[单项选择]How many of new Silent Riders were in regular service at the moment


A. None.
B. Twenty.
C. Fifty.
D. One.

[单项选择]Its skin color follows a regular twenty-four hours cycle that exactly matches the daily ______ of the sun.


A. rotation
B. variance
C. rhythm
D. motion

[单项选择]It was not until 1920 （　） regular radio broadcast began.
A. that
B. while
C. which
D. since